#autoload

local -a type paths_allowed typearg datasetlist expl
local expl_type

zparseopts -D -E t+:=type p=paths_allowed

[[ -n $type[(r)fs] ]]   && typearg=( filesystem )
[[ -n $type[(r)vol] ]]  && typearg=( $typearg volume )
[[ -n $type[(r)snap] ]] && typearg=( $typearg snapshot )
if [[ -n $typearg ]]; then
	typearg=( -t ${(j:,:)typearg} )
# We know we're in zfs list if paths_allowed is non-empty.
elif [[ -n $opt_args[-t] && ${#paths_allowed} -gt 0 ]]; then
	typearg=( -t $opt_args[-t] )
fi

if [[ ${#paths_allowed} -gt 0 && $PREFIX == /* ]]; then
	_path_files
	return
fi

datasetlist=( ${="$(zfs list -H -o name $typearg)":#no datasets available} )

expl_type=${typearg[2,-1]//,/\/}
if [[ -n $type[(r)mtpt] ]]; then
	mlist=( ${="$(zfs list -H -o mountpoint $typearg)":#no mountpoints available} )
	datasetlist=( $datasetlist $mlist )
	expl_type="$expl_type/mountpoint"
fi

_wanted dataset expl "$expl_type" _multi_parts "$@" -q / datasetlist